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LibGfx/WebPWriter: Do not convert -inf to unsigned

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Else UBSan complains about the color indexing test in this PR.
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Nico Weber 2024-05-31 15:50:41 -04:00 • committed by Jelle Raaijmakers
commit 47d3245ea7
Notes: sideshowbarker 2024-07-17 04:32:07 +09:00
1 changed files with 1 additions and 1 deletions
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Userland/Libraries/LibGfx/ImageFormats/WebPWriterLossless.cpp
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@ -206,7 +206,7 @@ static ErrorOr<CanonicalCode> write_normal_code_lengths(LittleEndianOutputBitStr
// "int length_nbits = 2 + 2 * ReadBits(3);
// int max_symbol = 2 + ReadBits(length_nbits);"
// => length_nbits is at most 2 + 2*7 == 16
unsigned needed_length_nbits = floor(log2(encoded_lengths_count - 2) + 1);
unsigned needed_length_nbits = encoded_lengths_count > 2 ? floor(log2(encoded_lengths_count - 2) + 1) : 2;
VERIFY(needed_length_nbits <= 16);
needed_length_nbits = ceil_div(needed_length_nbits, 2) * 2;
TRY(bit_stream.write_bits((needed_length_nbits - 2) / 2, 3u));